Carel EVD ice User manual

Brand: Carel

Model: EVD ice

Category: Measuring, testing & control

Type: User manual

High Efficiency Solutions

EVD ice

NO POWER

& SIGNAL

CABLES

TOGETHER

READ CAREFULLY IN THE TEXT!

User manual

Superheat control

for unipolar electronic expansion valve

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

WARNINGS

CAREL bases the development of its products on decades of experience

in HVAC, on the continuous investments in technological innovations

to products, procedures and strict quality processes with in-circuit and

functional testing on 100% of its products, and on the most innovative

production technology available on the market. CAREL and its subsidiaries

nonetheless cannot guarantee that all the aspects of the product and the

software included with the product respond to the requirements of the nal

application, despite the product being developed according to start-of-the-

art techniques. The customer (manufacturer, developer or installer of the nal

equipment) accepts all liability and risk relating to the conguration of the

product in order to reach the expected results in relation to the specic nal

installation and/or equipment. CAREL may, based on specic agreements, acts

as a consultant for the positive commissioning of the nal unit/application,

however in no case does it accept liability for the correct operation of the nal

equipment/system.

The CAREL product is a state-of-the-art product, whose operation is specied

in the technical documentation supplied with the product or can be

downloaded, even prior to purchase, from the website www.carel.com.

Each CAREL product, in relation to its advanced level of technology, requires

setup/conguration/programming/commissioning to be able to operate in

the best possible way for the specic application. The failure to complete such

operations, which are required/indicated in the user manual, may cause the

nal product to malfunction; CAREL accepts no liability in such cases.

Only qualied personnel may install or carry out technical service on the

product.

The customer must only use the product in the manner described in the

documentation relating to the product.

In addition to observing any further warnings described in this manual, the

following warnings must be heeded for all CAREL products:

• prevent the electronic circuits from getting wet. Rain, humidity and all

types of liquids or condensate contain corrosive minerals that may damage

the electronic circuits. In any case, the product should be used or stored

in environments that comply with the temperature and humidity limits

specied in the manual;

• do not install the device in particularly hot environments. Too high

temperatures may reduce the life of electronic devices, damage them and

deform or melt the plastic parts. In any case, the product should be used

or stored in environments that comply with the temperature and humidity

limits specied in the manual;

• do not attempt to open the device in any way other than described in the

manual;

• do not drop, hit or shake the device, as the internal circuits and mechanisms

may be irreparably damaged;

• do not use corrosive chemicals, solvents or aggressive detergents to clean

the device;

• do not use the product for applications other than those specied in the

technical manual.

All of the above suggestions likewise apply to the controllers, serial boards,

programming keys or any other accessory in the CAREL product portfolio.

CAREL adopts a policy of continual development. Consequently, CAREL

reserves the right to make changes and improvements to any product

described in this document without prior warning.

The technical specications shown in the manual may be changed without

prior warning.

The liability of CAREL in relation to its products is specied in the CAREL general

contract conditions, available on the website www.carel.com and/or by

specic agreements with customers; specically, to the extent where allowed

by applicable legislation, in no case will CAREL, its employees or subsidiaries

be liable for any lost earnings or sales, losses of data and information, costs of

replacement goods or services, damage to things or people, downtime or any

direct, indirect, incidental, actual, punitive, exemplary, special or consequential

damage of any kind whatsoever, whether contractual, extra-contractual or

due to negligence, or any other liabilities deriving from the installation, use or

impossibility to use the product, even if CAREL or its subsidiaries are warned

of the possibility of such damage.

DISPOSAL

INFORMATION FOR USERS ON THE CORRECT

HANDLING OF WASTE ELECTRICAL AND ELEC-

TRONIC EQUIPMENT (WEEE)

In reference to European Union directive 2002/96/EC issued on 27 January

2003 and the related national legislation, please note that:

1. WEEE cannot be disposed of as municipal waste and such waste must be

collected and disposed of separately;

2. the public or private waste collection systems dened by local legislation must

be used. In addition, the equipment can be returned to the distributor at

the end of its working life when buying new equipment;

3. the equipment may contain hazardous substances: the improper use or

incorrect disposal of such may have negative eects on human health

and on the environment;

4. the symbol (crossed-out wheeled bin) shown on the product or on the

packaging and on the instruction sheet indicates that the equipment has

been introduced onto the market after 13 August 2005 and that it must

be disposed of separately;

5. in the event of illegal disposal of electrical and electronic waste, the penalties

are specied by local waste disposal legislation.

Warranty on the materials: 2 years (from the date of production, excluding

consumables).

Approval: the quality and safety of CAREL INDUSTRIES products are

guaranteed by the ISO 9001 certied design and production system, as well

as by the marks (*).

CAUTION: separate as much as possible the probe and digital input signal

cables from the cables carrying inductive loads and power cables to avoid

possible electromagnetic disturbance.

Never run power cables (including the electrical panel wiring) and signal

cables in the same conduits.

NO POWER

& SIGNAL

CABLES

TOGETHER

READ CAREFULLY IN THE TEXT!

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

Content

1. INTRODUCTION 7

1.1 Models ............................................................................................................ 7

1.2 Functions and main characteristics ............................................................. 7

1.3 Accessories ....................................................................................................... 7

2. INSTALLATION 8

2.1 Dimensions - mm (in) ................................................................................... 8

2.2 Assembly on the evaporator ........................................................................ 8

2.3 Application diagrams ...................................................................................... 9

2.4 Wiring description ......................................................................................... 10

2.5 Wiring .............................................................................................................. 10

3. USER INTERFACE 11

3.1 Keypad............................................................................................................. 11

3.2 Display and visualisation ............................................................................ 11

3.3 Programming mode ..................................................................................... 11

3.4 Restore default parameters (factory) ........................................................ 11

4. COMMISSIONING 12

4.1 Commissioning procedure ......................................................................... 12

4.2 Parameters ﬁrst conﬁguration .................................................................... 12

5. FUNCTIONS 13

5.1 Control ............................................................................................................. 13

5.2 Special control function: smooth lines ..................................................... 14

5.3 Service parameters ....................................................................................... 14

6. PROTECTORS 15

6.1 Protectors ........................................................................................................ 15

7. PARAMETERS TABLE 17

8. NETWORK CONNECTION 18

8.1 RS485 serial conﬁguration .......................................................................... 18

8.2 Network connection for commissioning via PC .................................... 18

8.3 Visual parameter manager .......................................................................... 18

8.4 Restore default parameters ......................................................................... 19

8.5 Setup by direct copy ..................................................................................... 19

8.6 Setup using conﬁguration ﬁle ....................................................................20

8.7 Read the conﬁguration ﬁle on the controller ........................................20

8.8 Variables accessible via serial connection .............................................. 21

8.9 Control states ................................................................................................. 22

8.10 Special control states ....................................................................................23

9. ALARMS 24

9.1 Types of alarms ..............................................................................................24

9.2 Probe alarms .................................................................................................. 24

9.3 Control alarms ...............................................................................................24

9.4 Valve emergency closing procedure .........................................................24

9.5 Network alarm ............................................................................................... 24

9.6 Alarm table .................................................................................................... 25

10. TROUBLESHOOTING 25

11. TECHNICAL SPECIFICATIONS 26

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

1. INTRODUCTION

EVD ice is an electronic superheat controller for Carel unipolar expansion

valves. EVD ice has been specially designed to be installed near the valve,

directly on the refrigerant circuit, simplifying installation and making

electronic expansion valve technology available directly on board the

unit.

The plastic cover material on EVD ice guarantees total protection,

allowing the controller to operate in particularly dicult environmental

conditions, such as low temperatures and high humidity (condensation).

EVD ice can be installed directly on a unit cooler/evaporator inside a cold

room.

The controller is already tted with sensors, signal and power cables:

to complete the system, simply select the most suitable valve body

and pressure transducer for the required cooling capacity from the

compatible Carel product range.

EVD ice controls refrigerant superheat and optimises refrigerant circuit

eciency. It allows considerable system exibility, being compatible

with various types of refrigerants, in applications with refrigerators and

chiller/air-conditioners. It features low superheat protection (LowSH),

high evaporation pressure (MOP) and low evaporation pressure (LOP)

functions.

The device also has a user interface that displays the instant superheat

value at all times, signals any alarms, and above all can be used to set the

operating parameters.

When installing the controller, only three initial parameters are required

to start controlling the valve in the system:

- type of refrigerant

- operating mode (cold room, showcase, etc.)

- superheat set point.

EVD ice can easily be accessed via an RS485 serial connection (Modbus

protocol), for supervision of operating parameters and alarms in real time.

The serial connection can also be used to set the operating parameters

over a remote connection; in this case, combination with other Carel

controllers is recommended (supervisors and cold room controllers).

1.1 Models

P/N Description

EVDM011R3* EVD ice 115/230 V, E2V stator, display

EVDM011R1* EVD ice 115/230 V, E2V stator, display, Ultracap module

connector

EVDM011R4* EVD ice 115/230 V, E3V stator, display

EVDM011R2* EVD ice 115/230 V, E3V stator, display, Ultracap module

connector

(*): 0/1=single/multiple package (10 pcs)

Tab. 1.a

1.2 Functions and main characteristics

In summary:

• superheat control with LowSH, MOP, LOP functions;

• compatibility with various types of refrigerants;

• guided setup procedures rst, entering just three parameters on the

user interface: refrigerant (Gas), type of control (Mode) and superheat

set point (Superheat);

• activation/deactivation of control via digital input or remote control

via serial connection;

• controller and valve power supply incorporated (230 V/115 V);

• RS485 serial communication incorporated (Modbus protocol);

• IP65/IP67;

• operating conditions: -30T40C° (-22T104°F);

• compatible with Carel E2V and E3V single-pole valves.

From the software revision 1.7 the Smooth lines function has been

introduced.

1.3 Accessories

Ratiometric pressure probe P/N SPKT0013P0 (-1 to 9.3 bars)

The ratiometric pressure probe specied as default for assembly is P/N

SPKT0013P0, with an operating range from -1 to 9.3 barg. Alternatively,

other probes can be installed, setting the corresponding parameter

accordingly. See the “Functions” chapter.

Fig. 1.a

P/N Type Photo nr.

SPKT0053P0 -1…4.2 barg 1

SPKT0013P0 -1…9.3 barg

SPKT0043P0 0…17.3 barg

SPKT0033P0 0…34.5 barg

SPKT00B6P0 0…45 barg

SPKT00E3P0 -1…12.8 barg

SPKT00F3P0 0…20.7 barg

SPKT00G1S0 0…60 barg 2

SPKT00L1S0 0…90 barg

Tab. 1.b

Unipolar valve body

The valve body, to be purchased separately, is assembled using the stator

supplied with EVD ice. For the part numbers, see the CAREL product

catalogue.

Fig. 1.b

Ultracap module (P/N EVDMU**R**)

The module guarantees temporary power to the driver in the event of

power failures, for enough time to immediately close the connected

electronic valve. It avoids the need to install a solenoid valve. The module

is made using Ultracap storage capacitors, which ensure reliability in

terms of much longer component life than a module made with lead

batteries.

Fig. 1.c

1 2

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

2. INSTALLATION

2.1 Dimensions - mm (in)

79.4 (3.1)

92.4 (3.6)

∅

4.5 (0.2)

170 (6.7)

45.5 (1.8)

61.3 (2.4)

40.7(1.6)

19.6 (0.8)

~230 (9.1)

Cable (*) Length (±5%)

Power supply 500 (19.7)

RS485 500 (19.7)

Pressure probe 800 (31.5) --> E2V

1800 (70.9) --> E3V

NTC probe 1800 (70.9)

E2V/ E3V valve 600 (23.6)

Ultracap 100 (3.9)

(*)= for standard CAREL part numbers

Fig. 2.a

2.2 Assembly on the evaporator

Important:

• install EVD ice on the evaporator away from the places where

ice forms;

• connect the power and serial cables in the IP65 junction box;

• for assembly of the E2V/ E3V valve, see the “ ExV system” guide

(+030220810).

Ratiometric pressure transducer

Evaporator

Solenoid

valve

Liquid

indicator

Filter

Liquid

separator

Condenser

EVD ice

E2V/ E3V Unipolar

expansion valve

Evaporator unit

NTC temp. probe

Compressor

P T

WALL

Fig. 2.b

EVD ice can be installed directly on the evaporator. Mark the position and

drill the holes (Ø <4.5 mm). Then tighten the fastening screws.

GAS Type

Mode

Super Heat

Fig. 2.c

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

2.3 Application diagrams

WITH SOLENOID VALVE

COLD ROOM

OUT

COLD ROOM

OUT

Evaporator

ON / OFF

EVD ICE

driver

230 V

230 V input

Regulator

P T

EEV

Condenser

Electrical panel

Compressor

Condenser

unit

Evaporator

unit

Solenoid

valve

IP65

Fig. 2.d

WITHOUT SOLENOID VALVE, WITH ULTRACAP MODULE

COLD ROOM

OUT

COLD ROOM

OUT

Evaporator

ON / OFF

EVD ICE

driver

230 V

230 V input

Regulator

P T

EEV

Condenser

Electrical panel

Compressor

Condenser

unit

Evaporator

unit

IP65

EVD ICE

ULTRACAP

Fig. 2.e

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

2.4 Wiring description

The driver for superheat control requires the use of an evaporation pressure

probe S1 and suction temperature probe S2, which will be tted downstream

of the evaporator, and a digital input to trigger control. Alternatively, the signal

to trigger control can be sent via a remote serial connection.

Note: input S1 is programmable. See the “Functions” chapter

The following are already wired on EVD ice:

• pressure probe and temperature probe cables;

• electronic expansion valve stator;

• Ultracap module connection cable (on models where featured);

• power and serial line cables.

The power and serial line connections are identied by the colours of

the wires.

Note: for probe installation see “Guide to EEV system”, (+03022811).

RS485

Modbus®

CVSTDUM0R0

pCO

shield shield

VPM

digital input to start

the regulation

230 Vac

ratiometric

pressure

transducer

Valve stator

0,3 Nm

CAREL E V/ E V

² ³

unipolar valve

NTC

bianco/ white - Tx/Rx+

nero/ black - Tx/Rx-

marrone/ brown - L

blu/ blue - N

nero/ black - DI

ULTRACAP

Module

Non rimuovere

il cappuccio

di protezione A!

Do not remove

the protection cap A!

verde/ green - GND

GAS Type

Mode

Super Heat

fascia elastica/ elastic band

fascetta di ssaggio/ fastening band

pasta conduttiva/ conductive cream

Fig. 0.a

Rif Cable Description

A ExV Unipolar electronic valve connection

B Ultracap Ultracap module connection (accessory)

C Probe S2 NTC temperature probe

D probe S1 Ratiometric pressure probe

E Power supply

L: brown Phase 230 V

N: blue Neutral 230 V

DI: black 230 V digital input to enable control

F Serial

Tx/ Rx +: white RS485 connection

Tx/ Rx -: black

GND: green

1 - Computer for conguration

2 - USB– RS485 converter (for computer)

Tab. 0.a

2.5 Wiring

For installation, proceed as shown below, with reference to the wiring

diagrams and the technical specications table:

1. connect the pressure probe that suits the refrigerant. For details on

refrigerant ---> suggested pressure probe, see the chapter on

“Commissioning”;

2. connect the power cable and the digital input cable: for the maximum

length, see the technical specications;

3. power on the driver: the display will light up, and the driver will await the

commissioning parameters. See the chapter on “Commissioning”;

4. program the driver, if necessary: see the “User interface” chapter.

Note: if connecting to a serial network, see the previous diagram for

details on connecting the shield to earth.

Installation environment

Important: avoid installing the drivers in environments with the

following characteristics:

• strong vibrations or knocks;

• exposure to aggressive and polluting atmospheres (e.g.: sulphur

and ammonia fumes, saline mist, smoke) to avoid corrosion and/or

oxidation;

• strong magnetic and/or radio frequency interference (therefore avoid

installing the devices near transmitting antennae);

• exposure of the drivers to direct sunlight and to the elements in

general.

Important: the following warnings must be observed when

connecting the drivers:

• if the driver is used in a way that is not specied in this user manual,

protection cannot be guaranteed;

• incorrect power connections may seriously damage the driver;

• separate as much as possible (at least 3 cm) the probe and digital input

cables from cables to electrical loads, to avoid possible electromagnetic

disturbance. Never run power cables (including the electrical panel

cables) and probe signal cables in the same conduits;

• do not run probe signal cables in the immediate vicinity of power

devices (contactors, circuit breakers, etc.). Reduce the path of probe

cables as much as possible, and avoid spiral paths that enclose power

devices;

• *EVD ice is a controller to be incorporated into the nal equipment; it

must not be wall-mounted;

• * DIN VDE 0100: protective separation must be guaranteed between

the SELV circuits (Safety Extra Low Voltage) and the other circuits. The

requirements of DIN VDE 0100 must be complied with. To prevent

disruption of the protective separation (between the SELV circuits and

the other circuits) ensure additional fastening near the terminations.

This additional fastening must secure the insulation and not the wires.

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

3. USER INTERFACE

The user interface comprises the two-digit display and keypad with three

buttons that, pressed alone or in combination, are used to perform all the

conguration and programming operations on the driver.

GAS Type

Mode

Super Heat

1 2

Fig. 3.a

Key

1 Parameter label (for commissioning/setup)

2 Keypad

3 LED status digital input start/stop control

blink/OFF = DI closed/open

4 Two-digit display

(*) when digital input is closed the LED blinks and control is active.

During commissioning/setup, the parameter label shows the meaning

of the segments displayed in the rst digit, corresponding to the three

parameters being set:

A. GAS Type: type of refrigerant;

B. Mode: operating mode;

C. Superheat: superheat set point.

See the “

Commissioning

” chapter.

GAS Type

Mode

Super Heat

GAS Type

Mode

Super Heat

GAS Type

Mode

Super Heat

A. Refrigerant B. Mode (operating mode) C. Superheat set point

3.1 Keypad

Key Description

UP / DOWN

• Increases/decreases the value of the set point or

other selected parameter

PRG/Set

• At the end of the commissioning procedure, if

pressed for 2 s, exits the menu and control starts;

• Enter/ exit programming mode, saving the

parameters;

• Reset E8 alarm.

Tab. 2.a

3.2 Display and visualisation

During normal operation, the two-digit display shows the superheat

measure and any alarms.

The display interval for the superheat value is -5 to 55 K (-9 to 99 °F).

In general, values between -99 and 999 are displayed as follows:

1. values from 0 to 10 are displayed with decimal point and decimals;

2. values greater than 99 are displayed in two steps:

- rst, the hundreds, followed by “H”

- then the tens and units.

3. values less than -9 are displayed in two steps:

- rst the “-“sign;

- then the tens and units.

GAS Type

Mode

Super Heat

GAS Type

Mode

Super Heat

123 --->

GAS Type

Mode

Super Heat

GAS Type

Mode

Super Heat

-99 --->

Fig. 3.b

Note: the decimal point in the digit on the right indicates the status

of the digital start/stop adjustment input. With the input closed the dot

is lit ashing.

3.3 Programming mode

The parameters can be modied using the front keypad.

Important: modify the control parameters, ONLY AFTER having

completed the guided commissioning procedure, described in chapter 4.

Modifying the Service parameters

The Service parameters include, in addition to the parameters for the

conguration of input S1, those corresponding to the network address,

probe readings, protectors and manual positioning. See the parameter

table.

Procedure:

1. press UP and DOWN together and hold for more than 5 s: the rst

parameter is displayed: P1 = probe S1 reading;

2. press UP/ DOWN until reaching the desired parameter;

3. press PRG/ Set to display the value;

4. press UP/ DOWN to modify the value;

5. press PRG/ Set to conrm and return to the parameter code;

6. repeat steps 2 to 5 to modify other parameters;

7. (when the parameter code is displayed) press PRG/Set and hold for more

than 2 s to exit the parameter setting procedure.

GAS Type

Mode

Super Heat

Fig. 3.c

Note: if no button is pressed, after around 30 s the display

automatically returns to standard visualisation.

3.4 Restore default parameters (factory)

The driver can be reset to the default parameter values.

Procedure:

when the display is on standby, press all three buttons together . After

5 seconds, the display shows “rS”. The reset procedure can be conrmed

within 10 seconds, by pressing PRG/SET for 3 seconds. If no button is

pressed during this time, the procedure will be cancelled.

At the end the display shows two hyphens and then awaits the

commissioning parameters.

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

4. COMMISSIONING

Important: if the refrigerant is not available among the refrigerant

parameter options, contact CAREL service to:

1. conrm that the system: (c.pCO/Ultracella,...)+ EVD ice + CAREL electronic

expansion valve is compatible with the desired refrigerant (Gas

type=custom);

2. identify the values that dene the custom refrigerant and enter them for

parameters: “Dew a…f high/low” . See the variables accessible via

serial connection.

4.1 Commissioning procedure

Once the electrical connections have been completed (see the chapter

“Installation”) and the power supply has been connected, the operations

required for commissioning the driver depend on the type of interface

used, however essentially involve setting just 3 parameters: refrigerant,

functioning mode, superheat setpoint.

Important:

• until the commissioning procedure has been completed, control

will not be active;

• (only during commissioning) changing the gas involves changing

the value of the ratiometric probe parameter.

After powering up the driver, the display lights and the driver waits the

control parameters, indicated by the hyphens. The default parameters

are:

1. Refrigerant = R404A;

2. Type of control = multiplexed showcase/cold room

3. Superheat set point = 11 K.

Procedure:

GAS Type

Mode

Super Heat

1. The controller displays the bar at the top: refrigerant (GAS Type);

GAS Type

Mode

Super Heat

2. Press PRG/Set: the refrigerant setting is shown = 3: R404A

GAS Type

Mode

Super Heat

3. Press UP/Down to change the value

GAS Type

Mode

Super Heat

4. Press PRG/Set to save and return to the refrigerant parameter code

(bar at the top)

GAS Type

Mode

Super Heat

5. Press Down to move to the next parameter: Mode, indicated by the

bar in the middle;

6. Repeat steps 2,3,4,5, to set the values of the other parameters: Mode,

Superheat set point;

GAS Type

Mode

Super Heat

7. Press PRG/Set for 2 seconds to exit the commissioning procedure

and start control. The standard display is shown.

4.2 Parameters rst conguration

Important: ONLY DURING commissioning, changing the gas

involves changing the value of the ratiometric probe parameter; if not

specied in the table, the type of ratiometric probe is -1...9.3 barg.

Parameter/ description Def.

Gas Type = refrigerant

0 Custom

1 R22 15 R422D 28 R1234ze(-1...4.2 barg)

2 R134a 16 R413A 29 R455A (-1...12.8 barg)

3 R404A 17 R422A 30 R170 (0...17.3 barg)

4 R407C 18 R423A 31 R442A (-1...12.8 barg)

5 R410A 19 R407A 32 R447A (-1...12.8 barg)

6 R507A 20 R427A 33 R448A

7 R290 21 R245FA 34 R449A

8 R600(-1...4.2 barg) 22 R407F 35 R450A (-1...4.2 barg)

9 R600a (-1...4.2 barg) 23 R32 (0...17.3 barg) 36 R452A (-1...12.8 barg)

10 R717 24 HTR01 37 R508B (-1...4.2 barg)

11 R744 (0...45 barg) 25 HTR02 38 R452B

12 R728 26 R23 39 R513A (-1...4.2 barg)

13 R1270 27 R1234yf 40 R454B

14 R417A 41 R458A

3 =

R404A

Tab. 4.a

Note: if the refrigerant is not available among the refrigerant

options, “GAS Type=refrigerant”:

1. set any refrigerant (for example R404);

2. select the type of operating mode (Mode), the superheat set point

and complete the commissioning procedure;

3. use the VPM program (Visual Parameter Manager, see the chapter

“Network connection” ) and set the refrigerant type “0= Custom” and

the parameters “Dew a...f high/low” which dene the refrigerant (see

variables accessible via serial connection);

4. start control, for example by closing the digital input contact to

enable operation.

Mode = operating mode

1 Multiplexed cabinet/cold room

2 Air-conditioner/chiller with plate heat exchanger

3 Air-conditioner/chiller with tube bundle heat exchanger

4 Air-conditioner/chiller with nned coil heat exchanger

5 Reserved

6 Reserved

7 Cabinet/cold room with subcritical (R744) CO2

1 = Mul-

tiplexed

cabinet/

cold room

Superheat setpoint 11 K(20°F)

Tab. 4.b

Note: consider the unit of measure (°C/°F) when setting the

superheat setpoint (Si parameter).

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

5. FUNCTIONS

A low superheat temperature in fact corresponds to a situation of probable

instability due to the turbulent evaporation process approaching the

measurement point of the probes. The expansion valve must therefore

be controlled with extreme precision and a reaction capacity around

the superheat set point, which will almost always vary from 3 to 14 K.

Set point values outside of this range are quite infrequent and relate to

special applications.

EEV

Fig. 5.a

Key

CP compressor EEV electronic expansion valve

C condenser V solenoid valve

L liquid receiver E evaporator

F dewatering lter P pressure probe (transducer)

S liquid indicator T temperature probe

For the wiring, see

“Wiring description”

5.1 Control

EVD ice is a superheat controller. The type of refrigeration unit can be

selected using the “Operating mode” parameter.

Parameter/description Def.

Operating mode

1 Multiplexed cabinet/cold room

2 Air-conditioner/chiller with plate heat exchanger

3 Air-conditioner/chiller with tube bundle heat exchanger

4 Air-conditioner/chiller with nned coil heat exchanger

5 Reserved

6 Reserved

7 Banco frigo/cella con CO2 (R744) sub-critica

1 = multiple-

xed cabinet/

cold room

Tab. 5.a

Based on the operating mode setting , the driver automatically sets a

series of control parameters.

Operating mode PID: pro-

port. gain

PID: integra-

tion time

Superheat

set point

LowSH protection LOP protection MOP protection

threshold Integra-

tion time

threshold Integra-

tion time

thre-

shold

Integra-

tion time

1 Multiplexed cabinet/cold room 15 150 11 5 15 -50 0 50 20

2 Air-conditioner/chiller with plate heat exchanger 3 40 6 2 2,5 -50 4 50 10

3 Air-conditioner/chiller with tube bundle heat exchanger 5 60 6 2 2,5 -50 4 50 10

4 Air-conditioner/chiller with nned coil heat exchanger 10 100 6 2 10 -50 10 50 20

5 Reserved - - - - - - - - -

6 Reserved - - - - - - - - -

7 Banco frigo/cella con CO2 (R744) sub-critica

20 400 13 7 15 -50 0 50 20

Tab. 5.b

Superheat

The primary purpose of the electronic valve is ensure that the ow-rate

of refrigerant that ows through the nozzle corresponds to the ow-rate

required by the compressor. In this way, the evaporation process will take

place along the entire length of the evaporator and there will be no liquid

at the outlet (consequently in the branch that runs to the compressor). As

liquid is not compressible, it may cause damage to the compressor and even

breakage if the quantity is considerable and the situation lasts some time.

Superheat control

The parameter that the control of the electronic valve is based on is

the superheat temperature, which eectively tells whether or not there

is liquid at the end of the evaporator. The superheat temperature is

calculated as the dierence between: superheated gas temperature

(measured by a temperature probe located at the end of the evaporator)

and the saturated evaporation temperature (calculated based on the

reading of a pressure transducer located at the end of the evaporator and

using the Tsat(P) conversion curve for each refrigerant).

Superheat =

Superheated gas

temperature

(*)

–

Saturated evaporation

temperature

(*) suction

If the superheat temperature is high it means that the evaporation

process is completed well before the end of the evaporator, and therefore

ow-rate of refrigerant through the valve is insucient. This causes a

reduction in cooling eciency due to the failure to exploit part of the

evaporator. The valve must therefore be opened further. Vice-versa, if

the superheat temperature is low it means that the evaporation process

has not concluded at the end of the evaporator and a certain quantity

of liquid will still be present at the inlet to the compressor. The valve

must therefore be closed further. The operating range of the superheat

temperature is limited at the lower end: if the ow-rate through the valve

is excessive the superheat measured will be near 0 K. This indicates the

presence of liquid, even if the percentage of this relative to the gas cannot

be quantied. There is therefore un undetermined risk to the compressor

that must be avoided. Moreover, a high superheat temperature as

mentioned corresponds to an insucient ow-rate of refrigerant. The

superheat temperature must therefore always be greater than 0 K and

have a minimum stable value allowed by the valve-unit system.

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

PID parameters

Superheat control uses a PID algorithm. The control output is calculated

as the sum of separate contributions: proportional and integral.

• the proportional action opens or closes the valve proportionally to

the variation in the superheat temperature. Thus the greater the K

(proportional gain) the higher the response speed of the valve. The

proportional action does not consider the superheat set point, but

rather only reacts to variations. Therefore if the superheat value does

not vary signicantly, the valve will essentially remain stationary and

the set point cannot be reached;

• the integral action is linked to time and moves the valve in proportion

to the deviation of the superheat value from the set point. The greater

the deviations, the more intense the integral action; in addition, the

lower the value of Ti (integral time), the more intense the action

will be. The integral time, in summary, represents the intensity of the

reaction of the valve, especially when the superheat value is not near

the set point.

See the “EEV system guide” +030220810 for further information on

calibrating PID control.

Par. Description Def. Min. Max. UoM

- Superheat set point

11(20)

LowSH: threshold 55 (99) K(°F)

PID proport. gain 15 0 800 -

PID integral time 150 0 999 s

Note: when selecting the type of Mode, the PID control values

suggested by CAREL will be automatically set for each application.

Protector control parameters

See the chapter “Protectors”.

5.2 Special control function: smooth lines

Note: the Smooth_line parameter is only accessible via the

supervisor.

The smooth lines function optimises evaporator capacity based on actual

cooling demand, allowing more eective and stable control. The function

completely eliminates traditional on/o control cycles, modulating

the temperature exclusively using the electronic valve; superheat set

point is controlled through a precise PI control algorithm based on

the actual control temperature. The master controller (connected via

serial to EVD mini), through dynamic management of the Smooth_line

parameter, modies the superheat set point for management of the

electronic expansion valve, from a minimum (SH_SET) to a maximum

(SH_SET + Smooth_line): this consequently acts directly on the PID

control algorithm that modies the valve position. This is useful when

the control temperature approaches the set point; the Smooth_line

parameter is used to prevent the valve from closing, by reducing the

evaporator’s cooling capacity. In order to use this function, the digital

input must be congured as BACKUP. The Smooth_line parameter thus

allows the control set point to be adjusted instantly. In the event where

there is no network connection, the Smooth_line parameter is reset so as

to resume normal control (START/STOP from digital input and SH_SET as

the superheat set point). The main eects are:

• no swings in temperature and superheat due to the set point being

reached;

• stable temperature and superheat control;

• maximum energy savings due to load stabilisation.

Par. Description Def. Min. Max. U.M.

DI conguration

1=start/stop

2=control backup

1 1 2 -

Smooth_line

A: superheat set point

oset for smooth lines

0 -99(-55) 99(55) K/°F

Temp. set

SH set

SH_set+

Smooth_line

Fig. 5.b

Key

SH set Superheat set point t time

Temp.set Temperature set point

Note: the temperature setting based on the corresponding set

point is managed by the master controller, while superheat control is

managed by the EVD ice.

5.3 Service parameters

The other conguration parameters, to be set where necessary before

starting the controller, concern :

• the type of ratiometric pressure probe;

• the serial address for network connection;

• the type of unit of measure;

• enabling change in type of control (Mode);

• the number of steps (480/960) to control valve position.

Type of pressure probe (par. S1)

S1 is used to select the type of ratiometric pressure probe.

Par. Description Def. Min. Max. UoM

type of probe S1

1 = -1…4.2 barg

2 = 0.4…9.3 barg

3 = -1…9.3 barg

4 = 0…17.3 barg

5 = 0.85…34.2 barg

6 = 0…34.5 barg

7 = 0…45 barg

8 = -1…12.8 barg

9 = 0…20.7 barg

10 = 1.86…43.0 barg

11 = Reserved

12 = 0...60 barg

13 = 0...90 barg

3 1 13 -

Note: when setting the probe type, the maximum and minimum

limits for the pressure alarm are automatically dened. See “Variables

aaccessible via serial connection”.

Network address (par. n1)

See the “Network connection” chapter.

Unit of measure (par. Si)

It is possible to select the measure system of the driver:

• international (°C, K, barg);

• imperial (°F, psig).

Par. Description Def. Min. Max. UoM

Si Unit of measure: 1=°C/K/barg; 2=°F/psig 1 1 2 -

Note: the unit of measure K relates to degrees Kelvin adopted for

measuring the superheat and the related parameters.

When changing the unit of measure, all the values of the parameters

saved on the driver and all the measurements read by the probes will

be recalculated. This means that when changing the units of measure,

control remains unaltered.

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

Example 1: The pressure read is 20 barg this will be immediately

converted to the corresponding value of 290 psig.

Example 2: The “superheat set point” parameter set to 10 K will be

immediately converted to the corresponding value of 18 °F.

Access to the Mode (operating mode) parameter (par. IA)

To avoid accidental modication of the controller’s operating mode, it is

possible to disable the access to the corresponding parameter.

Par. Description Def. Min. Max. UoM

IA Enable operating mode modication

0/1 = yes/ no

0 0 1 -

Number of control steps (par. U3)

Total number of steps between the valve fully closed and fully open

position

Par. Description Def. Min. Max. UoM

U3 Number of valve control steps

1 / 2 = 480/960 steps

1 1 2 -

Digital input

The function of the digital input can be set by parameter:

Par. Description Def. Min. Max. UoM

di DI conguration

1=Start/Stop regulation

2=Regulation backup

1 1 2 -

Start/stop regulation:

• digital input closed: control active;

• digital input open: control in standby (see the paragraph “Control

states”).

Important: this setting excludes activation/deactivation of control

via the network. See the following function.

Regulation backup: if there is a network connection and communication

fails, the driver checks the status of the digital input to determine whether

control is active or in standby.

6. PROTECTORS

These are additional functions that are activated in specic situations that

are potentially dangerous for the unit being controlled. They feature an

integral action, that is, the action increases gradually when moving away

from the activation threshold. They may add to or overlap (disabling)

normal PID superheat control. By separating the management of these

functions from PID control, the parameters can be set separately, allowing,

for example, normal control that is less reactive yet much faster in

responding when exceeding the activation limits of one of the protectors.

6.1 Protectors

The protectors are 3:

• LowSH, low superheat;

• LOP, low evaporation temperature;

• MOP, high evaporation temperature;

The protectors have the following main features:

• activation threshold: depending on the operating conditions of the

controlled unit, this is set in Service programming mode;

• integration time, which determines the intensity (if set to 0, the

protector is disabled): set automatically based on the type of main

control;

• alarm, with activation threshold (the same as the protector) and

timeout (if set to 0 disables the alarm signal).

Note: The alarm signal is independent from the eectiveness of

the protector, and only signals that the corresponding threshold has

been exceeded. If a protector is disabled (null integration time), the

relative alarm signal is also disabled.

Each protector is inuenced by the proportional gain parameter (CP) of

PID superheat control. The higher is the value of CP, the more intensely

the protection will react.

Characteristics of the protectors

Protection Reaction Reset

LowSH Intense closing Immediate

LOP Intense opening Immediate

MOP Moderate closing Controlled

Tab. 6.a

Reaction: summary description of the type of action in controlling the

valve.

Reset: summary description of the type of reset following the activation

of the protector. Reset is controlled to avoid swings around the activation

threshold or immediate reactivation of the protector.

Note: all alarms are generated after a xed delay, as shown in the table:

Protectors Delay (s)

LowSH 300

LOP 300

MOP 600

LowSH (low superheat)

The protector is activated so as to prevent the low superheat from

causing the return of liquid to the compressor.

Par. Description Def. Min. Max. U.M.

C1 LowSH protection: threshold 5(9) -5(-9) Set point

superheat

K(°F)

C2 LowSH protection: integration time 15 0 800 s

When the superheat value falls below the threshold, the system enters low

superheat status, and the intensity with which the valve is closed is increased:

the more the superheat falls below the threshold, the more intensely the

valve will close. The LowSH threshold must be less than or equal to the

superheat set point. The low superheat integration time indicates the

intensity of the action: the lower the value, the more intense the action.

The integration time is set automatically based on the type of main

control.

OFF

Low_SH

Low_SH_TH

Fig. 6.a

key:

SH Superheat A Alarm

Low_SH_TH Low_SH protection threshold D Alarm delay

Low_SH Low_SH protection t Time

B Alarm automatic reset

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

LOP (low evaporation pressure)

LOP= Low Operating Pressure

The LOP protection threshold is applied as a saturated evaporation

temperature value so that it can be easily compared against the technical

specications supplied by the manufacturers of the compressors. The

protector is activated so as to prevent too low evaporation temperatures

from stopping the compressor due to the activation of the low pressure

switch. The protector is very useful in units with compressors on board

(especially multi-stage), where when starting or increasing capacity the

evaporation temperature tends to drop suddenly. When the evaporation

temperature falls below the low evaporation temperature threshold,

the system enters LOP status and is the intensity with which the valve is

opened is increased. The further the temperature falls below the threshold,

the more intensely the valve will open. The integration time indicates the

intensity of the action: the lower the value, the more intense the action.

Par. Description Def. Min. Max. U.M.

C3 LOP protection: threshold -50

(-58)

-85

(-121)

MOP protec.:

threshold

C(°F)

C4 LOP protection: integration time 0 0 800 s

The integration time is set automatically based on the type of main

control.

Note:

• the LOP threshold must be lower then the rated evaporation

temperature of the unit, otherwise it would be activated unnecessarily,

and greater than the calibration of the low pressure switch, otherwise

it would be useless. As an initial approximation it can be set to a value

exactly half-way between the two limits indicated;

• the protector has no purpose in multiplexed systems (showcases)

where the evaporation is kept constant and the status of the individual

electronic valve does not aect the pressure value;

• the LOP alarm can be used as an alarm to highlight refrigerant leaks by

the circuit. A refrigerant leak in fact causes an abnormal lowering of the

evaporation temperature that is proportional, in terms of speed and

extent, to the amount of refrigerant dispersed.

OFF

ALARM

OFF

LOP

LOP_TH

T_EVAP

Fig. 6.b

Key:

T_EVAP Evaporation temperature D Alarm timeout

LOP_TH Low evaporation temperature protection ALARM Alarm

LOP LOP protection t Time

B Automatic alarm reset

MOP (high evaporation pressure)

MOP= Maximum Operating Pressure.

The MOP protection threshold is applied as a saturated evaporation

temperature value so that it can be easily compared against the technical

specications supplied by the manufacturers of the compressors. The

protector is activated so as to prevent too high evaporation temperatures

from causing an excessive workload for the compressor, with consequent

overheating of the motor and possible activation of the thermal protector.

The protector is very useful in self-contained units if starting with a high

refrigerant charge or when there are sudden variations in the load. The

protector is also useful in multiplexed systems (showcases), as allows all

the utilities to be enabled at the same time without causing problems

of high pressure for the compressors. To reduce the evaporation

temperature, the output of the refrigeration unit needs to be decreased.

This can be done by controlled closing of the electronic valve, implying

superheat is no longer controlled, and an increase in the superheat

temperature. The protector will thus have a moderate reaction that tends

to limit the increase in the evaporation temperature, keeping it below the

activation threshold while trying to stop the superheat from increasing

as much as possible. Normal operating conditions will not resume based

on the activation of the protector, but rather on the reduction in the

refrigerant charge that caused the increase in temperature. The system

will therefore remain in the best operating conditions (a little below the

threshold) until the load conditions change.

Par. Description Def. Min. Max. U.M.

C5 MOP protection threshold 50

(122)

Protection LOP:

threshold

200

(392)

C(°F)

C6 MOP protection integration time 20 0 800 s

The integration time is set automatically based on the type of main

control.

When the evaporation temperature rises above the MOP threshold, the

system enters MOP status, superheat control is interrupted to allow the

pressure to be controlled, and the valve closes slowly, trying to limit the

evaporation temperature. As the action is integral, it depends directly on

the dierence between the evaporation temperature and the activation

threshold. The more the evaporation temperature increases with

reference to the MOP threshold, the more intensely the valve will close.

The integration time indicates the intensity of the action: the lower the

value, the more intense the action.

OFF

ALARM

OFF

PID

OFF

MOP

MOP_TH - 1

MOP_TH

T_EVAP

Fig. 6.c

Key:

T_EVAP Evaporation temperature MOP_TH MOP threshold

PID PID superheat control ALARM Alarm

MOP MOP protection t Time

D Alarm timeout

Important: the MOP threshold must be greater than the rated

evaporation temperature of the unit, otherwise it would be activated

unnecessarily. The MOP threshold is often supplied by the manufacturer

of the compressor. It is usually between 10 °C and 15 °C.

If the closing of the valve also causes an excessive increase in the suction

temperature (S2) above the set threshold – set via parameter (C7), not

on the display - the valve will be stopped to prevent overheating the

compressor windings, awaiting a reduction in the refrigerant charge. If

the MOP protection function is disabled by setting the integral time to

zero, the maximum suction temperature control is also deactivated.

Par. Description Def. Min. Max. U.M.

C7 MOP protection: disabling threshold

(86)

-85

(-121)

200

(392)

°C (°F)

At the end of the MOP protection function, superheat control restarts

in a controlled manner to prevent the evaporation temperature from

exceeding the threshold again.

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

7. PARAMETERS TABLE

Par. Description Def. Min. Max. UoM Type Carel Modbus® R/W Note

BASED (FISRT CONFIGURATION)

GAS

Type

Refrigerant 3 0 40 - I 12 139 R/W

Gas Type = Refrigerant

0 Custom

1 R22 15 R422D 28 R1234ze(-1...4.2 barg)

2 R134a 16 R413A 29 R455A (-1...12.8 barg)

3 R404A 17 R422A 30 R170 (0...17.3 barg)

4 R407C 18 R423A 31 R442A (-1...12.8 barg)

5 R410A 19 R407A 32 R447A (-1...12.8 barg)

6 R507A 20 R427A 33 R448A

7 R290 21 R245FA 34 R449A

8 R600 (-1...4.2 barg) 22 R407F 35 R450A (-1...4.2 barg)

9 R600a (-1...4.2 barg) 23 R32 (0...17.3 barg) 36 R452A (-1...12.8 barg)

10 R717 24 HTR01 37 R508B (-1...4.2 barg)

11 R744 (0...45 barg) 25 HTR02 38 R452B

12 R728 26 R23 39 R513A (-1...4.2 barg)

13 R1270 27 R1234yf 40 R454B

14 R417A 41 R458A

3 = R404A

Mode Operating mode

1 Multiplexed cabinet/cold room

2 Air-conditioner/chiller with plate heat exchanger

3 Air-conditioner/chiller with tube bundle heat exchanger

4 Air-conditioner/chiller with nned coil heat exchanger

5 Reserved

6 Reserved

7 Cabinet/cold room with subcritical (R744) CO2

1 1 7 - I 13 140 R/W

Super

Heat

Superheat set point 11

(20)

LowSH:

protection

threshold

(99)

(°F)

A 10 9 R/W

SERVICE

P1 S1 probe measurement - -85

(-290)

200

(2900)

barg (psig) A 6 5 R

P2 S2 probe measurement - -85

(-121)

200

(392)

°C(°F) A 7 6 R

tE Evaporation temperature (converted) - -85 (-121) 200 (392) °C(°F) A 4 3 R

tS Suction temperature - -85 (-121) 200 (392) °C(°F) A 3 2 R

Po Valve opening - 0 100 % A 1 0 R

CP PID proportional gain 15 0 800 - A 11 10 R/W

ti PID integral time 150 0 999 s I 17 144 R/W

C1 LowSH protection: threshold 5(9) -5

(-9)

Superheat

set point

(°F)

A 12 11 R/W

C2 LowSH protection: integral time 15 0 800 s A 13 12 R/W

C3 LOP protection: threshold -50(-

58)

-85(-121) MOP

protection

threshold

°C(°F) A 14 13 R/W

C4 LOP protection: integral time 0 0 800 s A 15 14 R/W

C5 MOP protection: threshold 50

(122)

LOP pro-

tection:

threshold

200

(392)

°C(°F) A 16 15 R/W

C6 MOP protection: integral time 20 0 800 s A 17 16 R/W

C7 MOP protection: disabling threshold 30

(86)

-85

(-121)

200

(392)

°C(°F) A 19 18 R/W

C8 Low suction temperature alarm threshold -50

(-58)

-85

(-121)

200

(392)

°C(°F) A 18 17 R/W

S1 S1 probe type

Ratiometric (OUT=0…5V)

1 = -1…4.2 barg 8 = -1…12.8 barg

2 = 0.4…9.3 barg 9 = 0…20.7 barg

3 = -1…9.3 barg 10 = 1.86…43.0 barg

4 = 0…17.3 barg 11 = Reserved

5 = 0.85…34.2 barg 12 = 0…60 barg

6 = 0…34.5 barg 13 = 0…90 barg

7 = 0…45 barg

3 1 11 - I 14 141 R/W

n1 Network address 99 1 99 - I 10 137 R/W

n2 Baud rate (bit/s)

0 4800, 2 stop bit, parity none 9 4800, 1 stop bit, parity even

1 9600, 2 stop bit, parity none 10 9600, 1 stop bit, parity even

2 19200, 2 stop bit, parity none 11 19200, 1 stop bit, parity even

3 4800, 1 stop bit, parity none 12 4800, 2 stop bit, parity odd

4 9600, 1 stop bit, parity none 13 9600, 2 stop bit, parity odd

5 19200, 1 stop bit, parity none 14 19200, 2 stop bit, parity odd

6 4800, 2 stop bit, parity even 15 4800, 1 stop bit, parity odd

7 9600, 2 stop bit, parity even 16 9600, 1 stop bit, parity odd

8 19200, 2 stop bit, parity even 17 19200, 1 stop bit, parity odd

2 0 17 - I 20 147 R/W

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

Par. Description Def. Min. Max. UoM Type Carel Modbus® R/W Note

Si Unit of measure 1=°C/K/barg ¦ 2=°F/psig 1 1 2 - I 16 143 R/W

IA Enable operating mode modication 0/1 = yes/ no 0 0 1 - I 15 142 R/W

U1 Enable manual valve positioning 0/1 = no/ yes 0 0 1 - D 11 10 R/W

U2 Manual valve position 0 0 999 step I 7 134 R/W

U3 Valve control steps: 1/2 = 480/960 steps 1 1 2 - I 11 138 R/W

U4 Valve opening at start-up (evaporator/valve capacity ratio) 50 0 100 % I 19 146 R/W

Fr Firmware release - - - - A 9 8 R

di DI conguration: 1=start/stop regulation; 2=backup regulation 1 1 2 - I 18 145 R/W

rt Reserved 1 1 1 -

L1 S1 alarm: Minimum pressure -1 -85(-121) S1 alarm:

Max pressure

barg (psig) A 20 19 R/W

H1 S1 alarm: Maximum pressure - S1 alarm:

Min press.

200 (392) barg (psig) A 21 20 R/W

Tab. 7.a

8. NETWORK CONNECTION

The driver can be connected via a network connection to:

1. a computer running the VPM software, for setting the parameters

before commissioning;

2. a pCO controller, loaded with the application program;

3. a PlantVisor/PlantVisorPRO supervisor, for remote monitoring and

alarm detection.

8.1 RS485 serial conguration

n1 assigns to the controller an address for serial connection to a

supervisory and/or telemaintenance system.

Par. Description Def. Min. Max. UoM

n1 Network address 1 1 99 -

n2 Baud rate (bit/s)

0 4800, 2 stop bit, parity none

1 9600, 2 stop bit, parity none

2 19200, 2 stop bit, parity none

3 4800, 1 stop bit, parity none

4 9600, 1 stop bit, parity none

5 19200, 1 stop bit, parity none

6 4800, 2 stop bit, parity even

7 9600, 2 stop bit, parity even

8 19200, 2 stop bit, parity even

9 4800, 1 stop bit, parity even

10 9600, 1 stop bit, parity even

11 19200, 1 stop bit, parity even

12 4800, 2 stop bit, parity odd

13 9600, 2 stop bit, parity odd

14 19200, 2 stop bit, parity odd

15 4800, 1 stop bit, parity odd

16 9600, 1 stop bit, parity odd

17 19200, 1 stop bit, parity odd

2 0 17 -

Important: all controllers connected in a serial network need to be

set with the same communication parameters.

8.2 Network connection for commissioning

via PC

Warnings:

• fasten the converter properly so as to prevent disconnection;

• complete the wiring without power connected;

• keep the CVSTDUMOR0 interface cables separate from the power

cables (power supply);

• in compliance with standards on electromagnetic compatibility, a

shielded cable suitable for RS485 data transmission is used.

The RS485 converter is used to connect a computer running the VPM

software to the EVD ice driver via a serial network, for commissioning the

controllers. The system allows a maximum of 99 units, with a maximum

network length of 500 m. Connection requires the standard accessories

(RS485-USB converter, CAREL P/N CVSTDUMOR0) and a 120 Ω terminating

resistor to be installed on the terminals of the last connected controller.

Connect the RS485 converter to controllers and make the connections

as shown in the gure. To assign the serial address, see parameter n1. See

the converter technical leaets for further information.

GND

USB-485

Converter

CVSTDUMOR0

USB

T+

T -

shield

EVD ice 1

EVD ice 2

EVD ice ...n

VPM

Fig. 8.a

8.3 Visual parameter manager

Go to http://ksa.carel.com and follow the instructions below. Select in

sequence:

1. “Software & Support”

2. “Conguration & Updating Softwares”

3. “Parametric Controller Software”

4. “Visual Parametric Manager”

A window will open with the possibility to download two les:

1. VPM_setup_X.Y.Z.W_full.zip: complete program;

2. X.Y.Z.W_VPM_Devices_Upgrade.zip: upgrade for supported devices;

If this is the rst installation, select Setup full, otherwise Upgrade. The

program installs automatically by running setup.exe.

Note: if choosing complete installation (Setup full), uninstall any

previous versions of VPM.

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

Programming

When opening the program, the device to be congured needs to be

selected: EVD mini. The Home page then opens, oering the choice

between starting a new project or opening an existing project. If using

the program for the rst time, choose new project.

Fig. 8.b

The following options are then available:

1. Directly access the list of parameters saved in EEPROM: select “RS485”;

The operations are performed in real time (ONLINE mode), at the top

right set network address 1 and choose the guided procedure for USB

port recognition, then go to “Device setup”;

Fig. 8.c

2. Selec t the model from the range based on the rmware version and list of

conguration parameters (EVDMINI0000E0X_R*.*). These operations

are performed in OFFLINE mode.

The pages marked 1) can be accessed wither Online or Oine, while

those marked 2) are Online only.

Fig. 8.d

The operations that can be performed on the pages marked 1) depend

on the rst selection made.

Note: to access the Online help press F1.

Ref. Description

Home Select operating mode

Online à RS485 (rear connector)

Oine à Device model

Online Oine

Device setup Read instant values of control

parameters

Select Load to load a list of

project parameters (.hex), modify

and save a new project.

Setup summary Display the default values for the current list of parameters

Custom setup See online help.

Update device Select list of parameters and

then Upload to controller

Upload

rmware

Select rmware and Upload -

Synoptic and

graphs

Overview with position of

probes and probe and su-

perheat readings in real time

Tab. 8.a

8.4 Restore default parameters

To restore the default parameter values on the controller:

1. Establish an RS485 serial connection between the computer and the

driver. The LEDs on the USB/RS485 converter will ash;

Fig. 8.e

2. Select “Update device” and:

a. Click button (A) to open the drop-down menu;

b. Select the list of parameters corresponding to the controller’s

rmware version: “EVDMINI***.hex”;

c. Click “Update” to load the parameters to the list and immediately

after restore the controller parameters to the default value.

Fig. 8.f

3. Go to “Device setup”: the program automatically reads the default

parameters saved on the controller.

8.5 Setup by direct copy

1. On the Home page select RS485 (rear connector);

Fig. 8.g

2. Go to “Device setup”;

Fig. 8.h

ENG

“EVD ice” +0300038EN - rel. 1.1 - 23.04.2018

a. on the “Rapid conguration” page, set parameters “p_GAS_TYPE” =

refrigerant and “p_SUPER_MAIN_REGULATION”= type of control;

Fig. 8.i

b. on the “Conguration” page, set parameter “p_SH_SET”.

Fig. 8.j

3. Check whether there are other parameters that need to be set (see the

“Functions” chapter);

4. Finally, select “Write” to copy the parameters to the controller.

Fig. 8.k

8.6 Setup using conguration le

On the Home page select “Device model”.

Fig. 8.l

The setup procedure comprises three steps:

1. Create the conguration le;

2. Copy the conguration le to the controller;

3. Read the conguration le on the controller.

Create the conguration le

1. Select the “Device setup” page;

2. Set the parameters by double clicking, as shown in the gure:

a. on the “Rapid conguration” page, parameters “p_GAS_TYPE” =

refrigerant and “p_SUPER_MAIN_REGULATION”= type of control;

b. on the “Conguration” page, parameter “p_SH_SET”.

Fig. 8.m

3. Save the list of parameters with a new name, for example “NEW_NAME.

hex”. To load and display a list saved by the user, select “Load” and

navigate to the path where the le is saved. On the other hand,

to load a list of parameters supplied by CAREL, select “Load” and

navigate the following path:

LoadàPluginsàCommissioning EVD mini àTXTàTXT32.

Save Load

Copy the conguration le to the controller

Select “Update device” and:

a. Click button (A) to open the drop-down menu;

NEW_NAME.hex

Fig. 8.n

b. Select the list of parameters corresponding to the project le

created: “NEW_NAME.hex”;

c. Click “Update” to UPLOAD the parameters to the controller.

8.7 Read the conguration le on the

controller

1. Go to the “Home” page and select RS485 (rear connector);

2. Go to “Device setup” to read the list of parameters on the controller and

make sure the settings are correct.

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Carel EVD ice User manual

Brand: Carel

Model: EVD ice

Category: Measuring, testing & control

Type: User manual

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Carel EVD ice User manual

Carel EVD ice User manual

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